Trying to download a rtmpt stream, RTMP_ReadPacket, failed to read RTMP packet header

[Dr. McKay]

I've been trying this for a few hours now and I've searched Google plenty, but I just can't get this to work. I'm trying to download the video at http://www.pinellascounty.org/Video/BCC/2013-02-26.htm. Checking out the page's source gives this playlist file: http://www.pinellascounty.org/Video/...2-26-flash.xml, which points to rtmpt://streamext1.co.pinellas.fl.us/ as the streamer and bcc-2013-02-26_arch001.mp4 as the filename.

So here's the command I'm trying to use:

rtmpdump -n streamext1.co.pinellas.fl.us -c 80 -l 1 -a "" -t "rtmpt://streamext1.co.pinellas.fl.us/bcc-2013-02-26_arch001.mp4" -p "http://www.pinellascounty.org/Video/BCC/2013-02-26.htm" -y "bcc-2013-02-26_arch001.mp4" -W "http://www.pinellascounty.org/Video/jwplayer/player.swf" -V -o "2013-02-26.mp4"

And here's my output:

RTMPDump v2.4
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
DEBUG: Protocol : RTMPT
DEBUG: Hostname : streamext1.co.pinellas.fl.us
DEBUG: Port     : 80
DEBUG: Playpath : bcc-2013-02-26_arch001.mp4
DEBUG: tcUrl    : rtmpt://streamext1.co.pinellas.fl.us/bcc-2013-02-26_arch001.mp4
DEBUG: swfUrl   : http://www.pinellascounty.org/Video/jwplayer/player.swf
DEBUG: pageUrl  : http://www.pinellascounty.org/Video/BCC/2013-02-26.htm
DEBUG: app      :
DEBUG: live     : no
DEBUG: timeout  : 30 sec
DEBUG: SWFSHA256:
DEBUG: 2f 17 c0 59 e0 fb 06 04 11 ac 97 d1 da 66 3c e9
DEBUG: 96 b5 53 8b 85 a5 5a ff b7 e4 2a 30 62 ab fb a7
DEBUG: SWFSize  : 224436
DEBUG: Setting buffer time to: 36000000ms
Connecting ...
DEBUG: RTMP_Connect1, ... connected, handshaking
DEBUG: HandShake: Client type: 03
DEBUG: HandShake: Client digest offset: 53
DEBUG: HandShake: Initial client digest:
DEBUG: c4 70 18 df a4 9d 08 85 52 2a fb ad 22 96 bf 1b
DEBUG: a1 60 d5 fa fa 51 cf ca 00 13 cc 63 54 8c 18 86
DEBUG: HandShake: Type Answer   : 03
DEBUG: HandShake: Server Uptime : 348581145
DEBUG: HandShake: FMS Version   : 0.0.0.0
WARNING: HandShake: client signature does not match!
DEBUG: HandShake: Handshaking finished....
DEBUG: RTMP_Connect1, handshaked
DEBUG: Invoking connect
INFO: Connected...
DEBUG: RTMPSockBuf_Fill, recv returned -1. GetSockError(): 10060 (Unknown error)

ERROR: RTMP_ReadPacket, failed to read RTMP packet header
DEBUG: Closing connection.

Any help would be greatly appreciated!